Device for increasing the draft of chimneys and for obtaining draft with bad chimneys.



G. GEESSELS.

DEVICE FOR INOREA'SING THE DRAFT 0F GHIMNBYS AND FOR OBTAINING DRAFT WITH BAD GHIMNEYS.

APPLICATION FILED MAILBO, 1908. 972,847; I Patented Oct. 18,1910.

GUILLAUME GEESSELS, OF BRUSSELS, BELGIUM.

DEVICE FOR INCREASING THE DRAFT orcHIMNEYs AND FOR OBTAINING DRAFT WITH ,BAD CHIMNEYS.

To all whom it may concern:

Be it known that I, GUILLAUME GnnssnLs, a subject of the King of Belgium, and resident of Brussels, Belgium, have invented certain new and useful Devices for Increasing the Draft of Chimneys and for Obtaining Draft with Bad Chimneys, of which the following is a specification.

This invention relates to chimneys and has especially for its object to provide a device applicable to the chimneys and adapted to increase the draft of chimneys which do not draw well and to establish a regular draft where it does not exist.

In the annexed drawing given by way of example: Figure 1 shows a section of the device applied to a chimney; Fig. 2 is a top plan view of same. Fig. 3 is a plan view of a modified form of the invention. Fig. 4 is a plan view illustrating a further modification of the invention.

As shown in the drawing my improved device includes a box or reservoir 1, made of any suitable material, and adapted to be secured to the upper discharge end of a chimney 2. Conveniently the box or reservoir is provided with a lower extension 3 shaped to fit the discharge end of the chimney, as clearly shown in Fig. 1. As shown the box or reservoir 1 has an internal area greater in cross section than the cross section of the chimney and is provided with a centrally disposed outlet pipe 4 which, as shown, is disposed in vertical alinement with the chimney 2. Arranged about the pipe 4 and communicating with the box or reservoir l are a plurality of pipes 5 which are reduced in size with respect to the size of the pipe 4.

As shown in Fig. 4 the box or reservoir 1 may continue upwardly about the pipes 4 and 9, as indicated at 6.

In the form shown in Fig. 3 the upward extension 6 and the pipes 4 are provided with partitions 7 forming separate chambers 8. The pipe 4 corresponds with the pipe 4 of Fig. 1 and the chambers 8 correspond with the pipes 5 of Fig. 1.

The total discharging capacity, or the combined cross-sectional areas of the pipes4 and 5 exceed the discharging capacity or total cross-sectional area of the chimney 2. The box or reservoir 1 has a cross-sectional area greater than all of the pipes 4 and 5 and also greater than the chimney 2. Now be;

Spcification of Letters Patent.

Application filed March 30, 1908.

Patented Oct. 18, 1910. Serial No. 424,228.

fore'the fire is started the chimney and all i the pipes 4 and 5 and the reservoir 1 are filled with cold air; When the fire is started the chimney 2 discharges the hot gases and smoke into the box or reservoir 1 and the buoyancy of the gases in ascending the pipes 4 and 5 at a greater rate than they can be discharged from the chimney 2 causes a partial vacuum in the reservoir or box 1. This partial vacuum induces a flow of cold air downwardly through any one of the pipes 5 to suificiently disrupt the tendency to form a vacuum and thereby prevent retardation of the outflow through the pipes 4 and 5. The gases and smoke ascend through the pipes 4 and 5 at a greater rate than they can be discharged from the chimney 2 because the combined discharging capacity of the pipes 4 and 5 is greater than the combined discharging capacity in the chimney 2. When the fire is first started there will be a tendency of the smoke and gases to find exit through pipe 4 and also through all of the pipes 5. However the smoke and gases will first seek pipe 4 because this is in alinement with the chimney and is larger than pipe 5 and because the smoke and gas will naturally seek the path of least resistance. Because of the fact that the discharging capacity of all of the pipes 4 and 5 is so much greater than that in the chimney 2 the ascending rate of the smoke in all of the pipes, at the start, will be relatively slow although it will be sufficient to tend to form a vacuum in the reservoir or box 1 which fact further retards ascension through the pipes 4 and 5. The ascension of the smoke and gases through pipes 5 will be at a less rate than through pipe 4 because pipe 4 is in the line of least resistance to the chimney 2. For this reason cold air will be induced down one or more of the pipes 5 suflicieut-ly to break the vacuum, or tendency to create one, in the reservoir 1 and this will release the smoke and gases and permit them to flow outwardly through pipe 4 and the remaining pipes 5 at a greater rate. After the reservoir 1 and the pipes 4 and 5 become heated this will increase the upward flow of the smoke and gases and the pipe through which the cold air flows downwardly will remain at a lower temperature and this will result in maintaining the condition of flow hereinbefo-re set forth.

To state the operation in other words, but

to adhere to the same principle, the partial vacuum in the reservoir 1 will not be sufficient to draw air downwardly through pipe 4 against a rising body therein of hot gases because the cross-sectional area of pipe 4 is sufiicient to prevent this. However the cross sectional area of pipes 5 is relatively reduced with respect to the cross sectional area of the pipe 4 and when at the start all of the gases and smoke seek egress through all of the pipes 5 and 4 the ascending action is sufficient-ly attenuated by being so diversified, as to permit the partial vacuum to induce a downward flow of cold air through one of the pipes 5. In operation it has been found that cold air will never descend through pipe 4 but it will descend through one of the pipes 5 and the selection thereof is purely arbitrary anddue to the conditions under which the device operates.

As soon as the parts become heated and the conditions of flow thoroughly established the induced cold air will be heated almost immediately upon its entrance into the reservoir or box 1 and will thereby augment the buoyant or ascending action of air and gases with which it mingles and materially increase the draft in the chimney.

I claim 1. In a device for increasing the draft of chimneys the combination with the upper end of the chimney, of a box having a greater diameter than the passage of the chimney, means for securing the said box to the chimney, a central pipe mounted upon the upper wall of the said box and having a smaller diameter than the passage of the chimney and a plurality of vertical pipes having a smaller diameter than the said central pipe and secured to the said top wall of the box around the said central pipe, substantially as and for the purpose set forth.

2. In a device for increasing the draft of chimneys the combination with the upper end of the chimney, of a box communicating with said chimney, a central pipe mounted on the upper wall of said box and having a smaller diameter than the passage of the chimney and a plurality of vertical pipes having a smaller diameter than the said central pipe and secured to the said top wall of the box around the said central pipe, substantially as and for the purpose set forth.

3. In a device for increasing the draft of chimneys the combination with the upper end of a chimney of a cylindrical box having a greater diameter than the chimney passage, a lower tubular extension secured to the said box and adapted to engage the said chimney opening, a central vertical pipe having a lesser diameter than that of the said chimney passage and secured to the upper wall of the said box, a plurality of vertical pipes having a smaller diameter than the central one and secured in the said upper wall of the box so as to surround the central pipe and to project into the said box, substantially as and for the purpose described.

4. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir, substantially as and for the purpose set forth.

5. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney and having a cross-sectional area exceeding the cross-sectional area of said chimney, a main outlet pipe connected with said reservoir, a plurality of auxiliary pipes connected with said reservoir, substantially as and for the purpose set forth.

6. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir and each reduced in size with respect to the size of said main outlet pipe.

7. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir, each of said auxiliary pipes being the same length as said main ipes.

, 8. In a device for increasing the raft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir each of said auxiliary pipes being reduced in size with res ect to the size of said main pipe and each 0 said auxiliary pipes being of the same length as said main p1 e.

In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney and having across-sectional interior exceeding the crosssectional interior 'of said chimney, a main pipe outlet connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir, each of said auxiliary pipes being reduced in size with respect to said main pipe.

10. In a device for increasing the draft of chimneys, the-combination with a reservoir connected with the chimney and having a cross-sectional interior exceeding the crosssectional interior of said chimney, a main pipe outlet connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir, all of said auxiliary pipes being equal in length to said main pipe.

11. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney and having a cross-sectional interior exceeding the crosssectional interior of said chimney, a main pipe outlet connected with said reservoir, and a plurality of auxiliary pipes connected with said reservoir, each of said auxiliary pipes being reduced in diameter with respect to said main pipe and each of said auxiliary pipes being of the same length as said main pipe, substantially as and for the purpose set forth.

12. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir and arranged in alinement with said chimney, and a plurality of auxiliary pipes connected with said reservoir.

13. In a device for increasing the draft of chimneys, the combination with a reservoir connected with the chimney, a main outlet pipe connected with said reservoir and having its longitudinal axis in alinement with the longitudinal axis of said chimney, and a plurality of auxiliary pipes connected with said reservoir and having their longitudinal axes disposed laterally of the longitudinal axis of said chimney.

14. A device for increasing the draft of chimneys comprising in combination with a chimney, a structure connected therewith and including a reservoir, and a plurality of outlet passages connected with and projecting from said reservoir.

15. A device for increasing the draft of chimneys comprising in combination with a chimney, a structure connected therewith and including a reservoir increased in size with respect to the cross section of said chimney, and a plurality of outlet passages connected with and projecting from said reservoir, one of said passages having a greater cross section than the other, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

GUILLAUME GEESSELS.

Witnesses:

C. VAN NELsEN, GREGORY PHELAN. 

